Thickness dependence of a CuI hole transport layer on initial photostability and photovoltaic performance of organic solar cells. - Yoon, Sangcheol; Kim, Hyebin; Shin, Eul‐Yong; Noh, Yong‐Young; Park, Byoungchoo; Hwang, Inchan (Physica Status Solidi. A: Applications & Materials Science, 2016)